On the environmental objective, certainly we are concerned about greenhouse gas emissions from fossil fuels. But we argue that the best way to address that would be to put a price on carbon, for example through a carbon tax, rather than try to subsidize alternatives. [That]'s much less efficient. The way the [current] rules work, electric vehicle manufacturers can sell credits to other automakers toward their fuel economy standards, so that means that other automakers can sell more polluting cars for every electric car that's sold.

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